Synthesis, characterization and catalytic studies of CHA zeotype materials containing boron and iron

Heteroatoms of boron and iron were incorporated into the framework of zeotype materials with CHA topology, and the materials were used as catalysts for the methanol-to-olefin (MTO) process. IR characterization showed that stretching vibration of the hydroxyl groups associated with the framework Fe appeared at 3615 cm−1. The catalysts exhibited interesting catalytic performance in the MTO reaction, which was attributed to their weak Brönsted acidities as well as the CHA topology.